不同风向作用下莱州湾水交换规律数模研究  

Numerical Simulation of Water Exchange in the Laizhou Bay Under the Influence of Wind With Different Direction

作　　者：迟万清 刘艳玲[3] 刘建强[2] 熊丛博[2] 张永强[2] CHI Wan qing;I IU Yan ling;LIU Jian qiang;XIONG Cong bo;ZHANG Yong qiang(College of Marine Oeosciences,Ocean University of China,Qingdao 266003,China;College of Environmental Science and Engineering,Ocean University of China,Qingdao 266003,China;The First Institute of Oceanography,SOA,Qingdao 266061,China)

机构地区：[1]中国海洋大学海洋地球科学学院,山东青岛266100 [2]国家海洋局第一海洋研究所,山东青岛266061 [3]中国海洋大学环境科学与工程学院,山东青岛266100

出　　处：《海洋科学进展》2018年第3期384-393,共10页Advances in Marine Science

基　　金：国家自然科学基金项目--多重人为压力下莱州湾生态环境的演变趋势和调控原理(U1706215);中央级公益性科研院所基本科研业务费专项资金资助项目--水面综合散热系数现场测定技术及其在温排水二维数学模型中的应用研究(2014T06)

摘　　要：为了解莱州湾在不同方向风作用下水动力和水交换状况,基于实测数据验证的海洋水动力模型Mike21FM对流场和余流场进行了数值模拟。水动力研究结果表明,风对莱州湾海流的影响不如余流明显。通过示踪剂输移扩散的水交换模型计算结果可知,不同风向对莱州湾不同海域水交换改善也不相同:E向风对东部海域水交换改善明显;N向风对西部海域水交换改善明显;W向风对整个莱州湾水交换能力改善最好;S向风对水交换能力改善最差。研究表明不但是污染源决定了污染物浓度的分布状况,水文气象条件也对污染物浓度分布有影响,应充分认识到不同水文气象条件对水体污染物分布的影响。To understand the influence of wind direction on hydrodynamics and water exchange in the Laizhou Bay,the numerical model Mike21 FM,which is verified by observed data,is used to simulate the current field and tidal residual current in the bay.The dynamical simulations shows that the residual current demonstrates stronger variability than the currents induced by wind with different direction.The results of tracer model show that the influences of winds from different directions on the water exchange in different areas of the Laizhou Bay are significantly different：the wind from the east improves water exchange remarkably in the eastern Laizhou Bay while the wind from the north enhances water exchange of the western bay;the westerly wind can strength the water exchange of almost entire bay while the southerly wind has little influence on water exchange.Further analysis shows that the distribution of contaminants is affected not only by the contamination source but also by the wind velocity and direction.Therefore,the impacts of hydrodynamics and wind should be both taken into account when evaluating the water quality in the Laizhou Bay.

关 键 词：莱州湾 水交换 示踪剂模型 水交换半周期 

分 类 号：P73[天文地球—海洋科学]